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PhysicsCollege Physics1st Edition

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Chapter 30, Problem 58PE
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College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

Solutions

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Section
Problem 1CQ
Problem 2CQ
Problem 3CQ
Problem 4CQ
Problem 5CQ
Problem 6CQ
Problem 7CQ
Problem 8CQ
Problem 9CQ
Problem 10CQ
Problem 11CQ
Problem 12CQ
Problem 13CQ
Problem 14CQ
Problem 15CQ
Problem 16CQ
Problem 17CQ
Problem 18CQ
Problem 19CQ
Problem 20CQ
Problem 21CQ
Problem 22CQ
Problem 23CQ
Problem 24CQ
Problem 25CQ
Problem 26CQ
Problem 27CQ
Problem 28CQ
Problem 29CQ
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Problem 59PE
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Problem 63PE
Problem 64PE
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Problem 66PE
Problem 67PE
Problem 68PE
Problem 69PE
Problem 70PE
Problem 71PE
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College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

Integrated Concepts

In a laboratory experiment designed to duplicate Thomson's determination of q e / m e , a beam of electrons having a velocity of 6.00 × 10 7   m / s enters a

5.00 × 10 − 3   T magnetic field. The beam moves perpendicular to the field in a path having a 6.80-cm radius of curvature. Determine q e / m e from these observations, and compare the result with the known value.

To determine

  qeme from observations and then compare the result with the known value of qeme

Explanation

Given Data:

In a laboratory experiment designed to duplicate Thomson's experiment of qeme , a beam of electrons having a velocity of 6×107m/s enters a 5.00×10−3T magnetic field. The beam moves perpendicular to the field in a path having a 6.8cm radius of curvature

Formula Used:

Centripetal force is calculated as

  F=mv2r

Where F= Force on electrons in a magnetic field

  m= Mass of electrons

  v= Velocity of electons

  r= Radius

Also, magnetic force is calculated as

  Fmag=qvB

Where B= Magnetic field

  v= Velocity of electron

  q= Charge of electron

Calculation:

In Thomson's experiment, centripetal force is balanced by magnetic force.

Thus, we have

  qvB=mv2r

  qm=v2rvB

  qm=vrB

We have B=5

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Ch-30 P-11CQCh-30 P-12CQCh-30 P-13CQCh-30 P-14CQCh-30 P-15CQCh-30 P-16CQCh-30 P-17CQCh-30 P-18CQCh-30 P-19CQCh-30 P-20CQCh-30 P-21CQCh-30 P-22CQCh-30 P-23CQCh-30 P-24CQCh-30 P-25CQCh-30 P-26CQCh-30 P-27CQCh-30 P-28CQCh-30 P-29CQCh-30 P-1PECh-30 P-2PECh-30 P-3PECh-30 P-4PECh-30 P-5PECh-30 P-6PECh-30 P-7PECh-30 P-8PECh-30 P-9PECh-30 P-10PECh-30 P-11PECh-30 P-12PECh-30 P-13PECh-30 P-14PECh-30 P-15PECh-30 P-16PECh-30 P-17PECh-30 P-18PECh-30 P-19PECh-30 P-20PECh-30 P-21PECh-30 P-22PECh-30 P-23PECh-30 P-24PECh-30 P-25PECh-30 P-26PECh-30 P-27PECh-30 P-28PECh-30 P-29PECh-30 P-30PECh-30 P-31PECh-30 P-32PECh-30 P-33PECh-30 P-34PECh-30 P-35PECh-30 P-36PECh-30 P-37PECh-30 P-38PECh-30 P-39PECh-30 P-40PECh-30 P-41PECh-30 P-42PECh-30 P-43PECh-30 P-44PECh-30 P-45PECh-30 P-46PECh-30 P-47PECh-30 P-48PECh-30 P-49PECh-30 P-50PECh-30 P-51PECh-30 P-52PECh-30 P-53PECh-30 P-54PECh-30 P-55PECh-30 P-56PECh-30 P-57PECh-30 P-58PECh-30 P-59PECh-30 P-60PECh-30 P-61PECh-30 P-62PECh-30 P-63PECh-30 P-64PECh-30 P-65PECh-30 P-66PECh-30 P-67PECh-30 P-68PECh-30 P-69PECh-30 P-70PECh-30 P-71PE

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